Home / 136,171.13-187,916.90-78,810.44

Finding the Fourth Proportional to 136,171.13, 187,916.90 and 78,810.44

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Solution

The fourth proportional to 136,171.13, 187,916.90 and 78,810.44 is: 108,758.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,171.13 : 187,916.90 = 78,810.44 : x
  2. Step 2: Convert to fraction form
    136,171.13/187,916.90 = 78,810.44/x
  3. Step 3: Cross multiply
    136,171.13x = 187,916.90 × 78,810.44
  4. Step 4: Simplify right side
    136,171.13x = 14,809,812,238.80
  5. Step 5: Solve for x
    x = 14,809,812,238.80/136,171.13
  6. Step 6: Final answer
    x = 108,758.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.